Consider the situation in which a landlord seeks to give a tenant notice (e.g. past rent, apartment inspection or servicing).
Does taping / affixing the notice to the outside of the tenant's apartment door without confirming that the tenant has heard and acknowledged the presence of the notice count as delivering the notice?
If the tenant rarely leaves their apartment (e.g. due to a quarantine), it may be expected that they would not be likely to see the notice in time, especially if the notice is particularly time-sensitive (e.g. 24-hour warning of apartment entry).
Jurisdiction: State of California